US Liquid Gallons to Imperial Gallons Converter
Convert US liquid gallons to Imperial gallons instantly with this free US liquid gallons to Imperial gallons converter. Enter any value to get an accurate volume conversion, plus the formula, the conversion factor and a full reference table.
What is 1 US liquid gallon in Imperial gallons?
1 US liquid gallon is equal to 0.832674185 Imperial gallons.
1 ÷ 1.20094993 = 0.832674185 Imperial gallons
1 US liquid gallon = 0.8326741846 Imperial gallons
US liquid gallons to Imperial gallons formula
imp gal = gal ÷ 1.20094993
The US liquid gallons to Imperial gallons conversion factor is 0.832674184629, which is exact by definition. 1 US liquid gallon = 0.832674184629 Imperial gallons, and 1 Imperial gallon = 1.2009499255 US liquid gallons.
Regional note. Gallons differ by region. A US liquid gallon is exactly 3.785411784 liters; an Imperial (UK) gallon is exactly 4.54609 liters — about 20% larger. This page uses the US liquid gallon.
Worked examples
- 2 US liquid gallons = 1.66534837 Imperial gallons — 2 ÷ 1.20094993 = 1.66534837 Imperial gallons
- 6 US liquid gallons = 4.99604511 Imperial gallons — 6 ÷ 1.20094993 = 4.99604511 Imperial gallons
- 10 US liquid gallons = 8.32674185 Imperial gallons — 10 ÷ 1.20094993 = 8.32674185 Imperial gallons
US liquid gallons to Imperial gallons conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| US liquid gallons (gal) | Imperial gallons (imp gal) |
|---|---|
| 1 gal | 0.83267418 imp gal |
| 2 gal | 1.6653484 imp gal |
| 3 gal | 2.4980226 imp gal |
| 4 gal | 3.3306967 imp gal |
| 5 gal | 4.1633709 imp gal |
| 6 gal | 4.9960451 imp gal |
| 7 gal | 5.8287193 imp gal |
| 8 gal | 6.6613935 imp gal |
| 9 gal | 7.4940677 imp gal |
| 10 gal | 8.3267418 imp gal |
| 12 gal | 9.9920902 imp gal |
| 15 gal | 12.490113 imp gal |
| 20 gal | 16.653484 imp gal |
| 25 gal | 20.816855 imp gal |
| 30 gal | 24.980226 imp gal |
| 50 gal | 41.633709 imp gal |
| 75 gal | 62.450564 imp gal |
| 100 gal | 83.267418 imp gal |
| 500 gal | 416.33709 imp gal |
| 1,000 gal | 832.67418 imp gal |
When you need to convert US liquid gallons to Imperial gallons
- Scaling recipes between metric millilitres and US cups, pints or fluid ounces.
- Comparing fuel prices and tank capacities between countries.
- Working out paint, fertiliser or pool chemical quantities from instructions written for another market.
Getting a feel for the scale
A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.
US liquid gallon (gal)
- A US milk jug is 1 gallon
- A mid-size car tank holds 12–16 US gallons
Imperial gallon (imp gal)
- An Imperial gallon is about 1.2 US gallons
- UK fuel prices are quoted per litre, not per gallon
Common mistakes to avoid
- Dividing when you should multiply. Because 1 US liquid gallon = 0.832674 Imperial gallons, the answer should be smaller than the number you started with.
- Mixing US and Imperial liquid measures. The Imperial gallon and pint are about 20% larger than their US counterparts, which is enough to ruin a recipe or misstate fuel economy.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
Cooking tolerates rounding to the nearest 5 mL or quarter cup. Dosing, chemistry and pool treatment do not — keep the full converted value there.
How these units are defined
- US liquid gallon (gal): Exactly 3.785411784 liters — the gallon used in the United States. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
- Imperial gallon (imp gal): Exactly 4.54609 liters — the gallon used in the UK and historically in Canada. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Related conversions
- Imperial gallons to US liquid gallons
- US liquid gallons to Milliliters
- US liquid gallons to Liters
- US liquid gallons to Cubic meters
- US liquid gallons to Cubic feet
- US liquid gallons to US teaspoons
- US liquid gallons to US tablespoons
- US liquid gallons to US fluid ounces
- US liquid gallons to US cups
- US liquid gallons to US liquid pints
- US liquid gallons to US liquid quarts
- US liquid gallons to Imperial pints
Frequently asked questions
- What is 1 US liquid gallon in Imperial gallons?
- 1 US liquid gallon is equal to 0.832674185 Imperial gallons.
- How many US liquid gallons are in one Imperial gallon?
- There are 1.20094993 US liquid gallons in 1 Imperial gallon.
- How do you convert US liquid gallons to Imperial gallons?
- Multiply the number of US liquid gallons by 0.832674185 — or use the formula imp gal = gal ÷ 1.20094993.
- What is 6 US liquid gallons in Imperial gallons?
- 6 US liquid gallons is 4.99604511 Imperial gallons. 6 ÷ 1.20094993 = 4.99604511 Imperial gallons.
- Is the US liquid gallons to Imperial gallons conversion exact?
- Yes. The relationship is fixed by definition, so 0.832674184629 is an exact conversion factor — only the displayed result is rounded.
- Does this use US or Imperial Imperial gallons?
- Gallons differ by region. A US liquid gallon is exactly 3.785411784 liters; an Imperial (UK) gallon is exactly 4.54609 liters — about 20% larger. This page uses the US liquid gallon.